96 m900 fcr41 carb leaking issue

[ducriderinct]

Yeah I figured. The weird part is, in my mind anyway, that at 1/16th turn out on the fuel screws alone, it got better, but any more than that on the fuel screws alone made it worse then before, however, the combination of both the fuel and the air screws a worked really well...in my mind, both were towards the same goal, richening the mixture; what am I missing in that one way worked and the other didn't?

Do the fuel screws adjust the overall mixture over all throttle positions, while the slow and air screws only richen/lean out the 1/8th- 1/4 throttle area?

Should I return the fuel trim screws back to stock and try that to take away some of the richness, or am I wasting my time ?

[ducpainter]

I don't know the answer about the fuel screws. I think they only adjust a certain range, but all the jets/adjustment overlap to some extent.

The way I learned was the first jet you need to get right is the main, and work backwards from there.

[koko64]

Seems like you richened it up a bit.

Check your plugs after a couple of rides to make sure you aren't going to have a fouling problem.

Yep I agree. Stinky raw fuel smell from riders behind is a sign. I'll say it again, try a smaller slow fuel/pilot or open the slow air screws to compensate if you dont want to touch em. Check those plugs as they will tell you a story.

[greenmonster]

Your plugs looked rich in the lats pics you`ve posted. Fuel smelly=rich.

"the slow air screws are about an 1/8th of a turn in from wherever they were which I'm assuming was probably stock settings as well."

Do not assume, make sure all is even.
Then, try w air screws 1 full turn out from fully closed, fuel screw 3/4 turn, open lid.

[koko64]

As delivered air screw setting is 1 1/2 turns out from lightly seated according to my CCW and SUDCO notes. 1 turn is a 360 degree turn btw.

[greenmonster]

From Chris' site:


Fuel screw
mixture screw   3/4 turn
Slow Air Screw   1-1/2 turns

[ducriderinct]

Ok. I'll give that a shot the next time I have a chance to get on the bike.

[ducriderinct]

Greenmonster's suggestion of 1 full turn out on the slow air screws and 3/4 turn out on the bottom carb screws seems to have done the trick! So far she runs great at partial throttle cruising on the highway and when I rev a little at a stop, the idle drops instantly right back down.

Also when I go to start it, I no longer need to mess with the idle knob. A quick pump on the throttle then she's instantly running. I'm hoping it's the screw setting and not that it's been 60+ degrees the last couple times I've ridden, but it seems to be sorted for now Thanks for all the help guys...  I